Improved roofing fabric



ALFRED ROBINSON,

OF NEW YORK, N. .Y.

IMPROVED ROOFING FABRIC.-

7 Specification forming part of Letters Patent No. 44,220, dated September 13, 1864. I

' it another sheet of paper or other fabric, and

upon this second sheet I apply a second layer of bitumen or bituminous composition, and in this manner contin ue to add successive layers of bitumen or bituminous composition and sheets of paper or other fabric until thelwhole has attained suitable thickness and strength. A coating of the bitumen or bituminous composition should be applied upon the upper or weather surface of the upper sheet of the roofing fabric.

The roofing constructed in this manner from thin but strong paper-such as Manila or hardware paper-possesses very great strength, all

that is required for roofing purposes, will not shrink away from its fasteniugs like woven cloth, and entirely prevents the tendency of bituminous cbmpounds to recede from the upper to the lower surface of the roofing fabric. This tendency is so great 1n woven fabrics that it is not uncommon after one summers wear,

' however well the woven fabric may have been saturated and coated with the bituminous compound, to find the cloth entirely bare and rotten from exposure to the weather, the bituminous substance having entirely passed through the interstices of the woven cloth. The high price of cotton has compelled the substitution of coarse fabrics-such asburlap, bagging, 8m. -with large openings through which the bituminous substance readily penetrates, to the certain injury of the roofing. All this is entirely obviated in my roofing. Moreover,my rooting costs only about half as much as the woven fabric. it can be made in any desired length and width, and put up in rolls suitable for transportation, and can be put on by any ordinary laborer.

A roofing fabric made substantially as and for the-purpose specified.

ALFRED ROBINSON. Witnesses:

R. B. TINDALL, B. FOSTER. 

